According to the different types of shaft, it can be divided into horizontal shaft grinder and vertical shaft grinder, such as vertical spindle cone table surface grinder, horizontal spindle rectangular table surface grinder, and grinding machine that hones the surface of workpiece with honing head. It is mainly used for honing workpiece hole in automobile, tractor, hydraulic parts, bearings, aviation and other manufacturing industries. There are two kinds of honing machines, vertical and horizontal.
Vertical honing machine has short working stroke of spindle, which is suitable for honing cylinder block and box hole. The honing head inlaid with oilstone is driven by a vertical spindle and driven by a hydraulic device for vertical reciprocating feed motion (see machine tool). The horizontal honing machine has a long working stroke and is suitable for honing deep holes with a depth of 3000 mm. The horizontal honing head does not rotate, but only does axial reciprocating motion. The workpiece is driven by the spindle. The center frame supporting the workpiece and the guide frame supporting the honing rod are set in the middle of the bed. In the process of machining, the oilstone of honing head makes radial feed under the action of expansion and contraction mechanism to process the workpiece to the required size step by step. The new honing machine mostly uses hydraulic expansion and contraction honing head. Honing machines are mostly semi-automatic, often with automatic measuring devices, but also can be incorporated into the automatic production line. In addition to the honing machine for machining holes, there are also cylindrical honing machines, bearing raceway honing machines, plane honing machines and surface honing machines for processing other surfaces.
Honing head generally has two ways: 1. Constant pressure feed, 2. Quantitative feed. Constant pressure feed is usually realized by hydraulic pressure, but also by spring. Quantitative feeding is usually realized by servo motor, stepper motor or some other intermittent mechanism. Manual feeding mode can also be regarded as quantitative feeding. What you are talking about may belong to the hydraulic constant pressure feed, honing head can not shrink, it may be that the expansion and contraction cylinder does not act, try to raise the pressure of the hydraulic system. Or the honing head is stuck, remove it and check it. In addition, the honing machine you use is reformed, and the structure may be different. Take a look at the manual and analyze the principle and structure.